AI agents call discussion_inbox to retrieve information from Lockstep without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads/queries discussions that are waiting for the agent's input. It is a polling/inbox-check operation with no writes, executions, or destructive actions. Low severity because misuse only exposes discussion metadata.
From the tool's definition "Check for discussions waiting on you" — retrieves pending discussion items with no side effects
Attacks that exploit this kind of access
Check for discussions waiting on you. Call this between tasks to see if anyone needs your input. It is categorised as a Read tool in the Lockstep MCP Server, which means it retrieves data without modifying state.
Register the Lockstep MCP server in PolicyLayer and add a rule for discussion_inbox: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Lockstep. Nothing to install.
discussion_inbox is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the discussion_inbox rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for discussion_inbox. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
discussion_inbox is provided by the Lockstep MCP server (tmmoore286/lockstep-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →